NUMERICAL INVESTIGATION OF EXPANSION ANCHORS RESPONSE TO PULL-OUT AND SHEAR LOADS

The helical pile is a foundation system that is used to support new buildings and for retrofitting deficient existing foundations. The performance of expansion anchors used to attach the helical pile connectors to foundations is assessed numerically. The anchors response to pull-out and shear loads was evaluated using non-linear finite element analysis. It was found that the pre-tension load had no influence on the anchor ultimate capacity but affected the anchor response at service load levels and the displacement at failure. Under pull-out loading, increasing the anchor diameter resulted in a more brittle response but did not affect the ultimate capacity when the concrete tensile strength dominated the response. For cases governed by the expansion mechanism, increasing the anchor diameter resulted in higher ultimate capacities and a more ductile behaviour. No interaction between anchors was observed for spacing ≥ 1.67 times anchor’s embedment depth. The anchor shear capacity was found to be dominated by the steel failure mode

Ultrasound guided single injection caudal epidural anesthesia of isobaric bupivacaine with/without dexamethasone for geriatric patients undergoing total hip replacement surgery

AbstractBackgroundDexamethasone has anti-inflammatory properties that can affect postoperative analgesia when added to caudal bupivacaine.MethodsSeventy-two geriatric patients scheduled for elective total hip replacement under ultrasound guided caudal anesthesia were randomized blindly into two groups: Group BD received caudal isobaric bupivacaine 0.25% (20ml) and dexamethasone 8mg (2ml) and Group BS received caudal isobaric bupivacaine 0.25% (20ml) and normal saline (2ml). Postoperative analgesia was assessed by recording time to first rescue analgesia and the analgesic doses (paracetamol and meperidine hydrochloride) required during the first 24h postoperatively as a primary outcome. Secondary outcomes were the time taken to the onset of sensory analgesia at T10, time to the onset of complete motor block, VAS pain score at rest and on movement at 1, 2, 4, 6, 8, 12 and 24h, and postoperative adverse events.ResultsGroup BD had a significantly longer time to first rescue analgesia [402 (63) vs 213 (53)] min and significantly lower doses of paracetamol [3389 (728) vs 2833 (697)] mg meperidine hydrochloride [78 (30) vs 142 (28)] mg than Group BS. VAS scores were significantly lower in Group BD than Group BS both at rest and on movement respectively at 4, 6, 8, 12 and 24h.ConclusionAdding dexamethasone with isobaric bupivacaine caudal anesthesia prolongs the duration of postoperative analgesia and decreased postoperative analgesic requirement in geriatric patients undergoing total hip replacement surgery in comparison isobaric bupivacaine alone

Conceptualisation and development of the admin-avatar taxonomy : antecedents, attitudinal and behavioural consequences

Academics and practitioners have increasingly acknowledged the significance of the consumer–brand relationship in both traditional and online contexts. However, the impersonal nature of the online environment is considered to be a hindrance in the development of the brand–consumer relationship. The literature suggests that strong relationship outcomes depend on successful relationship marketing tactics. Admin-avatar concept is a new concept -firstly emerged in this research- which can be used as a technological and marketing tactic. Admin-avatar can embody consumer-facing employees and mimic their real-life roles on companies’ websites, thereby playing a key role in enhancing the relationships between consumers and brands in the online environment. Despite the importance of this technology, very little attention has been paid to the investigation of the admin-avatar concept from a marketing perspective. Following a systematic review of the literature found in 10 major electronic databases and published between 1993 and 2013, significant gaps in literature were identified. Specifically, this research examines the nature of the admin-avatar concept, including its main characteristics, dimensions, and conditions as well as the attitudinal and behavioural consequences of admin-avatar users.Adopting the mixed methods design, a taxonomy was developed from interviews (qualitative phase) which laid the foundation for the development of the admin-avatar framework. Spiggle’s (1994) framework was adopted for the qualitative data analysis. A conceptual framework was developed and built on the theoretical foundations of reasoned action theory (Fishbein & Ajzen, 1975). The admin-avatar framework was empirically tested through a series of lab-based experiments (quantitative phase). Following a confirmatory factor analysis (CFA) was carried out to purify the scales, determine the dimensionality of the constructs and support their convergent and discriminant validity. The context used for this study was the university admissions admin-avatar. propositions were tested using repeated measures (first experimental deign study), factorial design (second experimental deign study) and serial mediation techniques for both experimental studies. The results mostly support the taxonomy developed from the qualitative phase.This thesis contributes to the new technology in marketing and practice, specifically by: (1) providing a clear and comprehensive definition of the admin-avatar concept, (2) developing a comprehensive taxonomy of admin-avatar that enriches the area of new technology in marketing by the further investigations by applying the taxonomy to other contexts (e.g., schools, banks, retails and other commercial companies), and (3) confirming the notion that the addition of an admin-avatar will transform the consumer attitude towards the website and the brand. Furthermore, the addition of an admin-avatar will prompt consumers to engage in voluntary behaviours such as saying positive things about the organisation/brand (word of mouth) and recommending the brand and its products to other potential consumers (recommendation). In other words, adding the admin-avatar on the brand website will significantly change the attitudes of brand’s consumers. These positive attitudes will encourage consumers to do voluntary behviours for the brand. From a practical perspective, these findings offer practitioners a clearer and richer understanding of the admin-avatar, facilitating appropriate designs for admin-avatar(s). The findings of this research also give practitioners clear insights into the main advantages of the admin-avatar, such as the degree of its convenience (e.g., quickness and effortless), hedonism (excitement) and attractiveness

Controversial debates about workforce nationalisation: Perspectives from the Qatari higher education industry

Workforce nationalisation in the Gulf Corporation Council (GCC) countries is a crucial challenge for their development plans. The current study explores controversial debates about workforce nationalisation to understand the existing threats from the views of less examined key stakeholders, namely, educators and senior students. The study argues that the identified obstacles relate not only to policy flaws but also to the education – employability gap, phantom employment, and detrimental social and community perceptions. Given its exploratory nature, the study adopts a qualitative approach and uses 28 semi-structured interviews to identify critical obstacles to effective workforce nationalisation from human development, legal development, and socio-cultural perspectives. The findings contribute to the literature on GCC workforce nationalisation by unpacking educators’ and senior students’ views

Revisiting the relationship between formal planning process and planning effectiveness: Do organizational capabilities and decision-making style matter?

Purpose: The purpose of this study is to address a timely research question by clarifying whether formal planning is a worthy approach for hotels. In so doing, the authors developed a theoretical model that extends prior research by exploring how the formal planning process influences organizational capabilities and decision-making style. The model also examines the impact of the three identified factors on planning effectiveness. Design/methodology/approach: Data were collected from 175 hotels located in United Arab Emirates (UAE) and Qatar and hypotheses were tested using structural equation modeling (SEM). Findings: The study concludes that the practice of formal planning in the tourism sector does matter and both organizational capabilities and decision-making style are important factors in predicting planning effectiveness. Research limitations/implications: Generalizations to organizations operating in other sectors, such as manufacturing or government sectors, should be drawn cautiously. Practical implications: Taking into account oil price volatility and serious political crises in the region, this study provides several insights to hotel managers into how the formal planning process can influence planning effectiveness. Originality/value: The findings enrich the debate on the role of formal planning in the tourism sector, which has been relatively devoid of similar studies. ? 2018, Said Elbanna, Tamer H. Elsharnouby.The authors acknowledge the fund received from Qatar University to conduct this study (Grant Number: QUUG-CBE-DMM-14/15-2).Scopu

Development of Gulf Cooperation Council human resources: an evidence-based review of workforce nationalization

Purpose – This study aimed to contribute to the field of Human Resource Management (HRM) by providing a critical review of existing scholarly research and a thematic analysis of the workforce nationalization domain in the Gulf Cooperation Council (GCC) countries. To strengthen the literature on this topic, it seeks to identify key gaps and areas for further exploration. Design/methodology/approach – A two-step systematic research methodology (qualitative and quantitative) and a thematic analysis of empirical and theoretical studies were used in this study. The quantitative review was conducted using a predesigned coding framework. Findings – The study identified and discussed four perspectives of workforce nationalization in the GCC countries. These were (1) the conceptualization of workforce nationalization; (2) the role of institutional policies in achieving it; (3) the practices and outcomes of nationalization efforts and (4) the impact of gender and women in the nationalization process. Research limitations/implications – This study has several limitations, which the authors have addressed by proposing several future research avenues. For example, the reviewed studies are skewed toward certain countries (e.g. UAE and Saudi Arabia), which limits the generalizability of their findings. Practical implications – A more comprehensive definition of nationalization, development of qualitative and quantitative measures to enhance HRM practices and outcomes, and the identification of alternative approaches to improve the employment of locals are emphasized as needs. Additionally, revised measures and mechanisms to rectify negative perceptions about entitlement and the revision of policies to integrate females in the national labor force are suggested. Originality/value – Workforce nationalization initiatives in the GCC region offer a unique and rich research phenomenon replete with managerial, organizational, economic and political dilemmas. The investigation of this phenomenon would profoundly enlighten employers, policymakers and scholars. Keywords GCC countries, Workforce nationalization, Localization, Human resource management Paper type Literature revie

Shoreline Changes Due to Construction of Alexandria Submerged Breakwater, Egypt

Sediment Transport and Morphodynamic

Avatar Taxonomy: A New Technological Tool to Enhance the Consumer-Brand Relationships

PurposeAvatars, which are used as a technology and marketing tactic, can embody consumer-facing employees and mimic their real-life roles on companies' websites, thereby playing a key role in enhancing the relationships between consumers and brands in the online environment. Academics and practitioners have increasingly acknowledged the significance of the consumer-brand relationship in both traditional and online contexts. However, the impersonal nature of the online environment is considered to be a hindrance to the development of these relationships. Despite the importance of this technology, little attention has been paid to the investigation of the avatar concept from a marketing perspective. This paper explores the nature of the avatar concept, including its main characteristics, dimensions, and conditions as well as the attitudinal and behavioural consequences of avatar users.Design/methodology/approachAdopting the qualitative design, a taxonomy was developed from interviews. In total, 42 interviews were conducted with current university students. 30 participants participated in the exploratory interviews. A total of 12 interviews were conducted during the in-depth stage based on findings in the preceding research.FindingsBased on the qualitative data analysis, a taxonomy was developed. The idea of the taxonomy is summarized in that different dimensions of the avatar are considered the main base (first phase) of the taxonomy. There are consequential three parts: the attitudinal consequences related to the website; the attitudinal consequences related to the brand; the behaviours towards the brand. These behaviours represent the final phase of the taxonomy.Originality/valueBy developing a taxonomy of using avatars on brands' websites, the authors advance the understanding consumer-brands relationships. Using avatars' verbal interactions helps in shaping consumers' cognitive, affective, attitudinal and behavioural responses and add vital empirical evidence to the increasing body of research and practices involving avatar usage in the interactive marketing area

SeSFJava: A Framework for Design and Assertion-Testing Of Concurrent Systems

Many elegant formalisms have been developed for specifying and reasoning about concurrent systems. However, these formalisms have not been widely used by developers and programmers of concurrent systems. One reason is that most formal methods involve techniques and tools not familiar to programmers, for example, a specification language very different from C, C++ or Java. SeSF is a framework for design, verification and testing of concurrent systems that attempts to address these concerns by keeping the theory close to the programmer's world. SeSF considers "layered compositionality". Here, a composite system consists of layers of component systems, and "services" define the allowed sequences of interactions between layers. SeSF uses conventional programming languages to define services. Specifically, SeSF is a markup language that can be integrated with any programming language. We have integrated SeSF into Java, resulting in what we call SeSFJava. We developed a testing harness for SeSFJava, called SeSFJava Harness, in which a (distributed) SeSFJava program can be executed, and the execution checked against its service and any other correctness assertion. A key capability of the SeSFJava Harness is that one can test the final implementation of a concurrent system, rather than just an abstract representation of it. We have two major applications of SeSFJava and the Harness. The first is to the TCP transport layer, where service specification is cast in SeSFJava and the system is tested under SeSFJava Harness. The second is to a Gnutella network. We define the intended services of Gnutella -- which was not done before to the best of our knowledge -- and we tested an open-source implementation, namely Furi, against the service